Medium Marine Porthole

 Marine Porthole

  • Medium Marine Porthole
Medium Marine Porthole

Medium Marine Porthole

  • Product description: Medium Marine Porthole install on the bulkhead deck or freeboard deck above deck side or top of deck superstructure.
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Medium Marine Porthole

Porthole is installed in the shipboard plates, superstructure and deck outdoor wall, on the hull of ship, can ensure the hull tightness, round window with anti-storm performance. Ship portholes reason are designed into round, according to the principle of mechanics, circular than other shapes more under pressure, shear stress.

Specification: For circular porthole specifications with transparent glass diameter usually 200mm, 250mm, 300mm, 350mm, 400mm, depending on the vessel size. The exit must be more than 350mm.

Portholes are made of metal materials, with toughened glass size and materials in accordance requirements, can has storm cover, can be open or fixed, according to different vessel wall connection has welded and bolted.



type D D1 D2 D3 D4 D5 h t α whorl qty opening
B LB RB 200 245 204 250 350 310 155 8 45° M16 8 253
250 295 254 305 400 364 182 8 48° M16 8 308
300 350 304 355 450 414 207 10 31° M16 12 363
350 400 354 410 500 464 232 12 31° M16 12 413
400 450 404 460 550 541 257 12 31° M16 12 463
450 500 454 510 600 564 282 15 31° M12 12 513


type D D1 D2 D3 D4 D5 h t α whorl qty opening
B SB 200 245 204 250 350 310 155 8 45° M12 8 253
250 295 254 305 400 364 182 8 42° M16 8 308
300 350 304 355 450 414 207 10 31° M16 12 363
350 400 354 410 500 464 232 12 31° M16 12 413
400 450 404 460 550 514 257 12 31° M18 12 463
450 500 454 510 600 564 282 15 31° M20 12 513


type D D2 D3 D4 D5 h t α whorl qty opening
B NB 200 204 250 350 310 155 8 M12 8 253
250 254 305 400 364 182 8 M16 8 308
300 304 355 450 414 207 10 31° M16 12 363
350 354 410 500 464 232 12 31° M16 12 413
400 404 460 550 514 257 12 31° M18 12 463
450 454 510 600 564 282 15 31° M20 12 513


type D D1 D2 D3 h t α gmax deadlight frame opening
B LW RW 200 245 204 250 155 8 45° 50 2 3 253
250 295 254 305 182 8 48° 47.5 2 3 308
300 350 304 360 207 10 31° 45 3 3 363
350 400 354 410 232 12 32° 45 3 3 413
400 450 404 460 257 12 31° 45 3 3 463
450 500 454 510 282 15 31° 45 3 4 513


type D D1 D2 D3 h t α gmax deadlight frame opening
B SW 200 245 204 250 155 10 45° 50 2 3 253
250 295 254 305 182 12 42° 47.5 2 3 308
300 350 304 360 207 15 31° 45 3 3 363
350 400 354 410 232 15 32° 45 3 3 413
400 450 404 460 257 19 31° 45 3 3 463
450 500 454 510 282 15 31° 45 3 4 513

type D D2 D3 h t α gmax deadlight frame opening
B NW 200 204 250 155 10 50 2 253
250 254 305 182 12 47.5 2 308
300 304 360 207 15 31° 45 3 363
350 354 410 232 15 31° 45 3 413
400 404 460 257 19 31° 45 3 463
450 454 510 282 15 31° 45 3 513